Per Gudmundson
type: MusicGroup
genre: swedish ballads
description: Per Gudmundson, born 1955, is a Swedish folk musician. He plays the fiddle and has also been instrumental in the revival of the Swedish bagpipes in Swedish folk music together with instrument maker Le
popularity: 12
followers: 1478
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x385072fd6859ec95d321bac97cc0f3be68d7116ea3ec9b6d482b01060cf9f184
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953598
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953598
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0d20e3a9-2ff5-4bfa-8900-a06412a504fa.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0d20e3a9-2ff5-4bfa-8900-a06412a504fa.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0d20e3a9-2ff5-4bfa-8900-a06412a504fa
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T06:40:11Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x385072fd6859ec95d321bac97cc0f3be68d7116ea3ec9b6d482b01060cf9f184","name":"Per Gudmundson","registered_at":"2026-06-14T05:47:15Z","symbol":"NIM0357353","token_address":"0x7308a68a55bb7c3487a249a17812316e117b6275","type":"artist","uuid":"0d20e3a9-2ff5-4bfa-8900-a06412a504fa"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385072fd6859ec95d321bac97cc0f3be68d7116ea3ec9b6d482b01060cf9f184. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d20e3a9-2ff5-4bfa-8900-a06412a504fa.json and https://artists.proofprofile.net/proofs/artist/0d20e3a9-2ff5-4bfa-8900-a06412a504fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T06:40:11Z
  text: {"copyright_id":"0x385072fd6859ec95d321bac97cc0f3be68d7116ea3ec9b6d482b01060cf9f184","name":"Per Gudmundson","registered_at":"2026-06-14T05:47:15Z","symbol":"NIM0357353","token_address":"0x7308a68a55bb7c3487a249a17812316e117b6275","type":"artist","uuid":"0d20e3a9-2ff5-4bfa-8900-a06412a504fa"}
album: Flöde
  type: MusicAlbum
  date published: 2004